432 SECTION 614 PILING WALLS
614.1 -DESCRIPTION : This work shall consist of furnishing and placing steel piles in predrilled holes, concrete or grout, backfill and lagging, of the kinds and dimensions designated, in accordance with these provisi ons and in reasonably close conformity with the lines, grades, dimensions, and locations shown on the Plans or established by the Engineer. Painting of the exposed steel is required. Careful attention shall be given to assuring the pile wall be embedded directly into existing stable ground or bedrock. Prior to ordering any materials, the Contractor in conjunction with the Engineer shall conduct a project site review in order to verify the limits of the pile wall.
614.2 -MATERIALS : Materials shall conform to the requirements specified in the following Subsections of
MATERIAL SUBSECTION Fine Aggregate 702.1 Fly Ash 707.4 Portland Cement 701.1 Reinforcing Steel 709.1 Steel Piles and Splices 709.12 Wales 709.12
614.3 -DRILLING : A drilled hole is required for the buried length of the pile. A minimum of ten (10) feet of the pile, is to be placed in bedrock/shale. Deviation from this requirement will be controlled by a Plan note. The total estimated pile lengths and the depths to the estimated bedrock/shale line are shown in the plans. Should the elevation of t he actual bedrock/shale vary from the estimated elevation by more than 2.5 feet, the Engineer must approve the hole prior to placement of the pile. The material from the drilled hole shall be removed and disposed of by the Contractor. Particular care mu st be taken in the drilling operation to avoid deflecting the bit along a sloping bedrock/shale line. To verify proper alignment, the Contractor shall measure and record the vertical alignment of the hole using a plumb bob or other acceptable method. Pil e alignment shall allow direct welding of wale to piles. Preferably, the diameter of the drilled hole shall be a size that will allow the pile, while being slowly lowered into the hole, to reach the bottom of the hole under the impetus of the pile weight. The minimum hole diameter shall be two ( 2) inches larger than the diagonal distance across the pile cross section. Temporary casing of holes may be needed to maintain an open clean hole through the soil overburden. There will be no additional compensation for temporary casing. The cost of any casing used shall be included in the unit price bid for piling.
614.4 -INSTALLATION OF PILES : Piles shall be located as shown on the Plans or as directed by the En gineer. Piles shall be installed with the pile center within one (1) inch of the Plan location. The piles must be prevented from rotating, so that the pile axis is within five (5) degrees of the position shown on the Plans.